Drilling machine



July 5, 1932. J. E. HORSTE DRILLING MACHINE Filed Dec. 50, 1929 5 Sheets$heet l R O T N E V m ATTORN EY'S July 5, 1932. J. E. HORSTE 1,865,567

DRILLING MACHINE Filed Dec. 50, 1929 5 Sheets-Sheet 2 N 1 INVENTOR F V Jose v77lT/z orste Y zwmm ATTORNEYS July 5, 1932. J. E. HQRSTE 1,865,567

DRILLING momma:

Filed Dec. 30, 1929 5 Sheets-Sheet 3 INVENTOR rfa'sepfi L. Atars 6e ATTORN BY July 5, 1932. J. E. HORSTE DRILLING MACHINE Filed Dec. 30, 1929 5 Sheets-Sheet 4 IN ENTOR J05 8797217 liars e ATTORN 5Y6 July 5, 1932. J. E. HORSTE DRILLING MACHINE Filed Dec. 30, 1929 5 Sheets-Sheet 5 INVENTOR ATTO EYS Patented July 5, 1932 UNITED STATES PATENT OFFICE JOSEPH E. HORSTE, OF DETROIT, MICHIGAN, ASSIGNOR TO DETROIT HARVESTER COM- PANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN DRILLING MACHINE Application filed December 30, 1929. Serial No. 417,547.

This invention relates generally to drilling machines, particularly machines for drilling holes or sockets in metal objects such as turnbuckles andthe like, and consists of certain novel features of construction, combinations and arrangements of parts that will be hereinafter more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a perspective view of a machine embodying my invention;

Figure 2 is a fragmentary longitudinal ver tical sectional view through the machine;

Figure 3 is an end elevation of the machine Figure 4 is an end elevation of the drum and showing a portion of the segment broken Figure 5 is a vertical sectional view on the line 5-5 of Figure 2;

Figure 6 is a vertical sectional view on the line 6-6 of Figure 2;

Figure 7 is an enlarged fragmentary vertical sectional View through the drum at the periphery thereof and showing one of the drills in engagement with the work after the work held by the movable holder after the drilling operation;

Figure 10 is a sectional view taken on the line 101O of Figure 7; 5 Figure 11 is a detail perspective 'view of one of the turnbuckle blanks before being drilled; V

Figure 12 is a view similar to Figure 11 after being drill-ed.

Referring now to the drawings, 1 and 2 respectively are laterally spaced standards, 3 is a stationary shaft extending between and terminally supported in said standards, 4 is a drum having three sections A, B and C respectively bolted together and rotatable as a unit on the shaft, 5 are rotatable shafts journaled in spaced peripheral flanges 6 and 7 respectively of the drum, 8 are drills projecting forwardly from the forward ends of the shafts 5, 9 are stationary work holders,

through the work holders and showing the and 10 are cooperating Work holders slidable longitudinally in a peripheral flange 11 of the drum.

12 is a sleeve rotatable on a reduced portion 13 of the drum, 14 and 15 are laterally spaced gears integral with the sleeve, 16 are pinions constantly meshing with the gear 15 and splined upon the shafts 5, one upon each shaft, whereby rotation of the gears 15 will cause the shafts 5 and drills 8 to rotate. 17 is a stub shaft journaled in the standard. 1 at one side of the reduced portion 13 of the drum, 18 is a pinion rigid with the stub shaft at the forward end thereof and constantly meshing with the gear 14 whereby rotation of the stub shaft 17 will cause the sleeve 12 and gear 15 to rotate. 19 is a sprocket wheel rigid with the stub shaft 17 at the rear end thereof, 20 is a source of power such as an electric motor, 21 is the motor armature or drive shaft, 22is a sprocket wheel rigid with this drive shaft, and 23 is a chain trained upon the sprocket wheels 22 and 19. Thus there is a positive drive between the motor shaft 21 through the sprocket wheel 22, chain 23, sprocket wheel 19, stub shaft 17, pinion 18, sleeve 12, pinions 16 and shafts 5 to the drills 8, and the latter will continue to rotate as long as the motor shaft 21 is in operation.

24 is a gear rigid with the rear end of the reduced portion 13 of the drum, 25 is a stub shaftjournaled in bearings 26 and 27 upon the inner side of the standard 1 at a point below the gear 24, 28 is a Worm rigid with the stub shaft 25 and meshing with the gear 24 whereby rotation of the stub shaft 25 will cause the gear 24 and drum 4 to rotate about the shaft 3. 29 is a gear loosely sleeved upon the stub shaft 25 and having a laterally projecting sleeve portion 30 having teeth 31 at its free end constituting clutch elements, 32 is a sleeve splined upon the stub shaft 25 and having teeth 33 at one end constituting complementary clutch elements for engagement with the teeth 31 on the sleeve 30 of the gear 29, 34 is a shifter fork pivotally connected to the standard 1 and sleeve 32 and having a stub handle 35 by which the fork may be manipulated, 36 is a stub shaft our naled in the standard 1, 37 is a worm on the stub shaft and meshing with the gear 29, 38 and 39 respectively are sprocket wheels rigid with the stub shaft 36 and motor drive shaft 21 respectively and 40 is a chain trained upon said sprocket wheels 38 and 39. Thus rotation of the motor shaft 21 will cause the sprocket wheels 38 and 39, stub shaft 36, worm 37 and gear 29 to rotate, but the drive from the gear 29 to the stub shaft 25 and thence through the worm 28 and gear 24 to the drum is under the control of the clutch elements 31 and 33. Thus with this construction, the drum may rotate in unison with the drills 8 or may remain stationary while the drills are rotating. If desired, a hand wheel 42 may be secured to the stub shaft 25 to enable the latter and drum 4 to be rotated by hand for any purpose, such as to make certain parts upon its periphery accessible when the clutch elements 31 and 33 are disengaged.

In the present instance the work, such as the turnbuckle blanks 43, is terminally held by the holders 9 and 10, and the shafts 5 and drills 8 are movable longitudinally of the drum to and from said work. As shown, 44 are collars sleeved upon and rigid with the shafts 5 at points approximately midway between the peripheral flanges 6 and 7. 45 are coil springs sleeved upon the shafts 5, one upon each shaft, between the collars 44 and flange 7 and resisting forward movement of the shafts 5 and drills, 46 are forwardly proj ecting metal straps bolted to the periphery of the flange 6, 47 are substantially L-shaped shifter forks pivotally connected intermediate their ends to the straps 46 having the furcations 48 thereof straddling the shafts 5 in engagement with the collars 44 and having the arm portions 48 thereof projecting forwardly over the peripheral flange 7 of the drum. 49 is a stationary cam keyed to the shaft 3 between the sections A and B of the drum, and 50 are cam followers movable longitudinally in radially extending slots 51 in the drum between the cam 49 and the arm portions 48 of the shifter forks. Preferably the cam surface 52 is at the periphery of the cam and extends from the inner end of the peripheral shoulder 53 about the cam to the outer end of said shoulder. Set screws 54 are mounted in the shifter arm portions 48 at the free ends thereof and are adjustable to effect the desired adjustments between said portions and the outer ends of the followers 50. Thus with this construction, when the drum 4 is rotated the followers 50 will be moved longitudinally gradually outwardly by the cam 49 and will cause the shifter forks 47 to move the shafts 5 and drills Sgradually forwardly into operative drilling engagement with the work 43 in the holders 9 and 10. Preferably the cam 49 is provided in the peripheral cam surface 52 at a point substantially opposite the shoulder 53 with a circumferentially extending substantially L-shaped recess 55 for the reception of the cam followers 50 to enable the drills 8, when the drilling operation is approximately half done, to cool off and the chips (not shown) formed in the work while being drilled to fall out, it being apparent that movement of the followers 50 into the recess 55 causes the shifter forks 47 and shafts 5 to be moved rearwardly so that the drills 8 will be temporarily withdrawn from the work 43. In this connection it will be noted that the chips are free to fall into a suitable receptacle such as 56 below the machine and therefore will not come into contact with any working part of the machine. Moreover, it will be noted that the springs 45 maintain the set screws 54 in engagement with the followers 50 and maintain the latter in engagement with the cam 49.

As shown, the stationary work holders 9 are tubular in form and extend transversely through a disk 57 clamped between the sections B and C respectively of the drum. Preferably the holders 9 receive the drills 8 and are provided at their forward ends with enlarged portions or heads 58 having conical recesses 59 therein for receiving the rear ends of the work 43. The longitudinally movable holders 10 have slots 60 in their rear ends for receiving the forward ends of the work 43 and have inclined or beveled forward ends 61. Followers 62 movable in radially extending slots 63 in the forward end of the drum section 0 have correspondingly inclined or beveled ends 64 engaging the beveled ends 61 of the holders 10 and are adapted to actuate the same. Preferably these followers 62 are retained in the slots 63 by a ring 65 bolted to the end of the drum sections C, and have sockets 66 at their inner ends receiving coil springs 67 extending radially from the periphery of a ring 68 on the shaft 3. Pins 69 project laterally from the followers 62 at the inner ends thereof and upon completion of the drilling operation are engageable with a trip D that causes the followers 62 at this point to be withdrawn from the holders 10 so that the work 43 may be received in a suitable receptacle (not shown). Preferably the trip D comprises a stationary segment 70 on the shaft 3 provided at its free end with a laterally projecting flange 71 of arcuate configuration having an upwardly and inwardly inclined lower edge portion 72. As shown, this inclined edge portion 72 is in the path of the pins 69 and serves to cam the same onto the arcuate inner face 73 of the flange 71, while this arcuate face 73 is offset a sufficient distance from the circle in which the pins 69 normally travel and is of suflicient length to enable the work 43 to be disengaged from the holders 9 and 10 and new work engaged therewith before the followers 62 are released by the flange 71 and again press the holders 10 rearwardly.

In the present instance the work holders 9 and drills 8 are cooled by water. As shown, 7 5 is an axial passage in the shaft 3 adapted to receive water from a pipe 76 leading from a suitable source, 77 are radial passages in the shaft 3 at the inner end of and adapted to receive water from the axial passage 75, 78 is an annular chamber about the shaft 3 and passages 77 and adapted to receive water from said passages, 7 9 and 80 respectively are spring pressed washers in the chamber 78 preventing escape of water therefrom, 81 are radial passages in the drum sections C for receiving water from the chamber 78, 82 are radial passages in the disk 57 in alignment with and adapted to receive water from the passages 81, 83 is a peripheral channel in the disk 57 having a cover 84, and 85 are diagonal passages in the disk for conducting water from the radial passages 82 to the work holders 9 receiving the drills 8. Thus this system of passages obviates respective pipes for the respective drills.

For lubrication purposes oil from a suitable source flows through axial passages 90 and 91 at opposite ends of the shaft 3 and thence through branch radial passages 92 to the rotating parts 12, A, B and C respectively.

Thus from the foregoing description it will be apparent that the machine requires very little attention, in fact, all the operator has to do is to feed the work blanks into the holders. It is positive in operation .and is not likely to get out of order. The drills run constantly as long as the motor is run While it is believed that from the forego-- ing description the nature and advantages of my invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described, and that such changes may be resorted to when desired as fall within the scope of what is claimed.

What I claim as my invention is:

1. In a drilling machine, a fixed shaft, a rotary drum on said shaft'including a pair of detachably connected sections, a stationary cam on said shaft arranged between and housed by the sections of said drum, a plurality of drills carried by the drum and mounted for movement in a direction parallel with the axis thereof, and actuating means for each of said drills including a radially movable follower actuated by said cam and connections between each of said drills and said followers.

2. In a drilling machine, a fixed shaft, a rotary drum on said shaft including a pair of detachably connected sections, a stationary cam on said shaft arranged between and housed by the sections of said drum, a plurality of drills carried by the drum and mounted for movement in a direction parallel with the axis thereof, and actuating means for each of said drills including a radially movable follower actuated by said cam, individual movable connections between each of said drills and said follower, and means for adjusting each of said connections independently whereby to alter the path of longitudinal movement of each of said drills.

3. In a drilling machine, a fixed shaft, a rotary drum on said shaft including a pair of detachably connected sections, one of said sections being provided with a recess surrounding said shaft, and a series of radial openings extending from said recess to the periphery of said drum, a stationary cam on said shaft arranged in said recess and housed between said sections, a plurality of drills carried by the drum and mounted for movement 7 

